Fan.



WILLIAM E CAKES, 0F INDIANAPOLIS,YINDIANA.

FAN.

Specification of Letters Patent.

Patented Apr. 16, 1912,

Application filed October 12, 1911. Serial No. 654,287.

To all whom ttmay concern.

Be it known thatI, WILLIAM H. OAKES, a citizen of the United States,residing at- Indianapolis, in the county of Marionand State of Indiana,have invented a new and useful Fan, of which the following is aspecification. j g

It is the object of my invention to improve and simplify theconstruction of fans. In carrying out my invention, the fan blades,which are preferablymade of a single punching with integral ringsconnectingtheir outer, and inner ends respectively, are connected to arotatable, annular central support by int-erfitting projections andapertures, which are clamped in interlocking position by a suitable cap,preferably the dust cap for the fan bearings.

The various novel features of my invention will appear from thedescription and drawing and will be particularly pointed out in theclaims.

In the drawing, which illustrates a pre-- ferred embodiment of myinvention, Figure 1 is a complete end elevation of a fan embodying myinvention; Fig. 2 is a somewhat enlarged longitudinal partial sectionthrough such fan substantially on the line 2-2 of Fig. 3; and Fig. 3 isa fragmentary view, with some parts removed and broken away, showingthe'central part of the fan.

The stub shaft 10 is provided with bear ing cones 11 and 12, theadjustable bearing cone 12 being held in adjusted position by a nut 13.Bearing balls 14 are located between the bearing cones and suitable ballraces 15, mounted on the inside of a tubular hub 16 and spaced apart bya spacing tube 15 held in place in the hub 16 by an oil cap 16. Suitabledust guards 31 may be provided in the bearings. On one end of the hub16, which is preferably made of steel tubing, is a pulley 17 or othersuitable power-transmitting device, and on the other a collar 18 havingan annular flange 19. The parts 15, 17 and 18 are preferably all made ofpressed steel and the parts 17 and 18 may conveniently be fastened tothe hub 16 by electric spot welding.

Mounted on the flange 19 is the fan blade structure, which preferablycomprises a central ring 20, skewed fan blades 21, and an outerreinforcing ring 22, the rings 20 and 22 respectively connecting theinner and outer ends of the fan blades and with them forming oneintegral structure. This cap 30, the collar 18 structure mayconveniently be a stamping of sheet steel. The reinforcing ring 22 maybe spun around a strengthening wire 23, if desired. 'To strengthen theinner part of the fan blade structure, the blades may be riveted to aspider comprising a ring 24 and arms 25.. The rings 20 and 24 arepreferably of the same size, and their inner edges fit over a shoulder26 on the flange 19, one face of the ring 24 hearing againstthe face ofsuch flange. The flange 19 is'provided with a plurality of notches 27,to receive ears 28 punched in the rings 20 and 24 and bentout of theirplane.v The ears 28 are held in the notches 27, and the rings 20. and 24against the flange 19, by a flange 29 of an internally threaded dustbeing threaded to receive such dust cap, which isalso preferably a sheetsteel stamping. The removal of the dust cap 30 allows the removal of theblade assembly in its entirety, or the removal or adjustment of theadjustable bearin cone 12, or the removal of the hub 16 an the partscarried thereby from the shaft.

My invention is not limited in its details to the precise arrangementshown, and I aim to cover all modifications which do not involve adeparture from the spirit and scope of my invention as set forth in thefollowin claims.

What claim as new is:

1. A fan structure comprising a flanged hub, a spider carrying aplurality of fan blades, the spider and the flange of the hub havinginterfit-ting projections and apertures, anda cap closingthe end of thehub and clamping the spider and flange together and the projections andapertures in interloclc ing position.

2. A fan structure comprising a flanged hub, a spider carrying aplurality of fan blades, the spider and the flange of the hub havinginterfit-ting projections and apertures, and a cap clamping the spiderand flange together and the projections and apertures in interlockingposition.

3. A fan structure comprising a shaft, a flanged hub rotatably mountedthereon, a plurality of fan blades, said fan blades and the flange ofthe hub having interfitting projections and apertures, and a cap closingthe end of the hub and clamping said projections and apertures ininterlocking position,

'4. A fan structure comprising a shaft, a flanged hub rotatablyimountedthereon, a plurality of fan blades, said fan blades and the flange ofthe hub having interfitting project-ions and apertures, and a capclamping said projections locking position.

5. A fanstructure',

and apertures in intercomprising a, shaft, a

hub rotata bly mounted on the shaft and,

having a circular flange, a plurality of fan blades connected at theirinner ends by a ring integral with the blades, said ring hearing againstthe flan eon the hub, and said ringvand' flange having interfitting earsand openings, and a threaded on and closing the end of the hul andclamping said ring 7. A fan structure comfprising a stub shaft,

a hub having a notched ange, ball bearings between the shaft and hub, aplurality of fan blades connected at their inner ends by a ring integralwith the blades, said ring bearing against the flange of the hub and aplurality of fan vhaving integral projections extending into the notchesof said flan e, and a flanged dust capthreaded on and c osing the end ofthe hub, the flange of the cap clamping the ring and the hub flangetogether and the projections in thenotches.

8. A fan structure comprising a stub shaft, a hub having a notchedflange, ball bearings between the shaft and hub, a plurality of fanblades connected at their inner ends by a ring integral with the blades,said ring bearing against the flange'of the hub and having integralprojections extending into the notches of said flange, and a flanged capthreaded on the end of the hub, the flan e of the cap the 'ub flangetogether and the projections in the notches.

9. A fan structure comprising a flanged hub, a flanged cap fitting onthe end of said hub, and a spider carrying a plurality of fan blades andlocated between the flange on the hub and the flange on the cap, saldspider and one of said flanges having interengaging projections andapertures.

In 'witness whereof, I have hereunto set my hand and seal atIndianapolis, Indiana. this 10th day of October, A. D. one thousand ninehundred and eleven.

FRANK A. FAHLE, G. B. SCHLEY.

clamping thering and

